Tidy up ordering

sbot/future/classless/motors.py

@@ -155,10 +155,11 @@ def _find_output(self, id: int) -> BoardIdentifier:
             raise ValueError(f"Output {id} does not exist")
 
     def _get_boards(self) -> list[SerialWrapper]:
-        return sorted(
-            set(output.port for output in self._outputs),
-            key=lambda x: x.identity.asset_tag,
-        )
+        unique_boards = []
+        for output in self._outputs:
+            if output.port not in unique_boards:
+                unique_boards.append(output.port)
+        return unique_boards
 
     def __repr__(self) -> str:
         board_ports = self._get_boards()

sbot/future/classless/servos.py

@@ -201,10 +201,11 @@ def _find_output(self, id: int) -> BoardIdentifier:
             raise ValueError(f"Output {id} does not exist")
 
     def _get_boards(self) -> list[SerialWrapper]:
-        return sorted(
-            set(output.port for output in self._outputs),
-            key=lambda x: x.identity.asset_tag,
-        )
+        unique_boards = []
+        for output in self._outputs:
+            if output.port not in unique_boards:
+                unique_boards.append(output.port)
+        return unique_boards
 
     def __repr__(self) -> str:
         board_ports = self._get_boards()

sbot/serial_wrapper.py

@@ -250,3 +250,14 @@ def __str__(self) -> str:
         return (
             f"<{self.__class__.__qualname__} {self.serial.port!r} {self.identity.asset_tag!r}>"
         )
+
+    def __lt__(self, other: SerialWrapper) -> bool:
+        return self.identity.asset_tag.lower() < other.identity.asset_tag.lower()
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, SerialWrapper):
+            return False
+        if self.identity.asset_tag != "":
+            return self.identity.asset_tag == other.identity.asset_tag
+        else:
+            return self.serial.port == other.serial.port